Take-up mechanism for looms.



PATENTED JUNE 2, 1903.

0. F. ROPER. TAKE-UP MECHANISM FOR LOOMS.

APPLICATION FILED FEB. 20, 1903.

N0 MODEL.

UNITED STATES; 1

Patented June 2, 1903.

PATENT OFFICE.

CHARLES F. ROPER, OF I-IOPEDALE, MASSAOITUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

TAKE-UP MECHANISMT FOR LOOiVlS.

SPEGIFICATION forming part of T Letters Patent No. 729,669, dated June 2, 1903. Application filed February 20, 1903. T Serial .No. 144.255. (No model.)

To aZZ whom it may concern: 7

Be it known that I, CHARLES F. ROPER, a citizen of the United States, and a resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improve ment in Take-Up Mechanism for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This inventionrelates to take-up mechan- T ism for looms; and it has for its object the production of means whereby greater accu racy of take-up can be efiected, avoiding the formation of thin places in the cloth, and as it is manifest that for each pick of the shuttle the take-up should be advanced provided filling is laidl have so constructed and arranged the mechanism embodying my invention that take-up is efiected substantially at or coterminous with the beat-up.

The various novel features of my invention will be described hereinafter in the subjoined specification and particularly pointed out in the following claims,

Figure 1 is a transverse sectional view of a portion of a loom with one embodiment of my invention applied thereto, the lay being on top center and the pick just about to be made. Fig. 2 is a front elevationof a portion of the take-up mechanism to be referred to, and Fig. 3is a detail showing the mode of arresting take-up when the loom is turned back under certain conditions.

Ihave herein illustrated my invention in connection with a portion of take-up mechanism forming the subject-matter of United States Patent No. 716,282, technically termed a worm take-up, but, as will appear hereinafter, the novel features of my present invention are applicable to other forms of mechanism.

As in the patent referred to, theshaft 12 of the take-up roll 11 has secured to it a wormgear 15, which is in mesh with and driven by a worm 16 on a shaft 17, a ratchet-disk 21,

having circularly-arranged teeth 22, Fig. 2,

being secured to the shaft 17, which is rotatably mounted in a bracket 14. The actuating-pawl 27 is pivotally mounted on said has no bearing upon this invention.

a lateral arm 31 and a depending finger 32. T

The lay 3, lay-sword 4, the controlling or operating rock-shaft 6, having an upturned arm 7 in the path of the weft-fork slide m of usual construction,the crank-shaft O of the loom, and cam-shaft C may be all of wellit known character, the rock-shaft 6 corresponding to the like shaft cl in United States Patent No. 659,628, and rocking thereof by or through an abnormal condition of the fillwill be described. The pick-cams P, one of which is herein shown, are secured to the cam-shaft O and each cooperates with a roll 19 on an arm 10 of the pick-shaftP Fig. 1, in usual manner, the connections between the pick-shaft and picker being omitted, as the same is of well-known construction and In my Patent No. 716,282 the pawl is actuated from the lay-sword and is at all times in operative connection therewith, and herein the pawl is it actuated by the lay-sword but at times it is thrown out of cooperative relation therewith, as will be described. Alink 33, pivotally coning is herein arranged to arrest take-up, as T T nected "at its upper end with the arm 31, is

jointedat its lower end to one arm 34 of a bellcrank fulcrumed at 34 on the loom side, Fig. 1, the other arm 35 of thebell-crank having pivoted to it a long rearwardly-extended transmitter 36, having in its lower edge a longitudinal recess orT notch 37. The lay-sword 4 has a bracket 40 thereon, provided with an upturned lug 41, adapted to enter the notch,

; as shown in Fig. 1. The r-ear end of the transmitter 36'is shown as slightly downturned at 38, andit rests upona cam'tt, shaped sometions of the cams being opposite and alike, as clearly shown. A spring 8X, Fig.1, fast at one end andattached at its other end to the what like a double tappet-cam, the high por 5 transmitter 36, serves to keep the end of the latter pressed toward the camt t and normally to maintain the transmitter in position to cooperate with the actuator 41. Between the free ends of the arms 34 and 35 a stop 39 is arranged on the loom side to prevent undue movement of the bell-crank in either direction.

Referring to Fig. 1, it will be seen that the pick-cam is just about cooperate to pick the shuttle and the actuator 41 is in readiness to move the transmitter 36 in the direction of arrow 36 as the lay moves from top to back center to thereby rock the bell-crank and lift the link 33, moving the pawl forward to set it in readiness for take-up. On the next forward beat of the lay the actuator will move the transmitter toward the front of the loom, returning the hell-crank to the position shown in Fig. 1, lowering the link 33 and advancing the pawl to effect the desired take-up for that pick of the shuttle.

Referring to Fig. 1, it will be seen that the cams 2. and t are set substantially quartering with relation to the high parts of the pickcams, it being understood that the latter are set opposite each other, as is usual, and that the cam-shaft O makes one revolution for every two of the crank-shaft C. When the loom is running properly, the lay moves from top center to back center before the cam 25 can lift the end 38 of the transmitter and elevate the notch 37 above the actuator 41, and consequently the latter will operate to set the take-up pawl, the cam 25 acting similarly so far as concerns the other pick-cam. (Not shown.) The cam t will then pass under the end 38 of the transmitter 36, raisingit slightly, but not enough to prevent the engagement of; the actuator 41 with the notch 37, the front end of the notch being engaged by the actuator on the forward beat of the lay to move the transmitter forward opposite arrow 36 and thereby draw down the link 33, advancing the take-up for the pick of filling just laid. WVhen the loom is stopped, however, it is frequently turned backward more or less by the operative for various reasons, and manifestly if turned back far enough to effect one pick or more the take-up should not operate, as the shuttle will not usually be thrown across the lay when the loom is turned back by hand. Let it be supposed that the loom is stopped just after the pick-cam P, Fig. 1, has operated the picking mechanism and the actuator 41 has moved the transmitter 36 to effect take-up, the lay then being practically on front center. If now the loom be turned backward, so that the lay is moved from its front center to back center, the cam 25 will pass under the end 38 of the transmitter 36, raising it sufficiently to prevent the actuator 41 from engaging the rear end of the notch 37, thereby preventing the setting of the pawl and obviating any possibility of effecting take-up upon the next forward movement of the lay, whether or not the 100111 be turnedin the proper direction. Were it not for this disconnection of the actuator and transmitter the backward stroke of the lay, due to retrograde motion of the loom, would cause the take-up mechanism to be set in readiness for an advance, and when the loom was again started up take-up would be effected when no filling had been laid and a thin place would be made in the cloth. In other words, the forward movement of the lay will always operate to effect take-up when the transmitter and its attached parts have been previously operated to set the pawl. The backward stroke of the lay will serve to set the pawl only when the loom is being turned over in the proper or forward direction.

From the foregoing description it will be seen that upon retrograde movement of the loom the backward stroke of the lay cannot serve to set the pawl, because such retrograde motion of the loom automatically prevents cooperation of the transmitter and actuator. Should the loom be turned back far enough or should the other pick-cam have operated, the other cam 25 will operate in like manner. The construction herein shown thus acts to de lay or retard the action of the take-up mechanism if the loom is stopped and turned back and no filling is laid, as take-up action in such case would act to produce a thin place in the cloth. If the loom when stopped is turned back, but not far enough to effect a pick, the detaining means described will not be called into operation, as no improper operation of the take-up would be effected by such retrograde movement. The length of the recess or notch 37 is such that the proper stroke of the transmitter 36 in each direction will be effected by or through engagement of the actuator 41 with the ends of the notch,and herein the latter is shown as long enough to permit some lost motion between its ends and the actuator.

In my Patent No. 716,282 I provided means to arrest take-up should the filling fail by disengaging the pawl and ratchet. Herein I also disengage the pawl and ratchet upon filling failure, but in a somewhat different manner. A segment 50, Fig. 1, is fulcrumed at 50 on a bracket 51 on the loom side and is provided with an inclined shelf 52, the segment being connected by a link 53 with the depending finger 32 of the pawl. The rockshaft 6 has secured to it a downturned arm 60, pivotally connected at its lower end to a rearwardly-extended bar 61, supported at its rear, end by an inclined shoulder 54 of the bracket 51, said bar having a beveled camface 62 to engage the shelf 52 when the bar is moved rearward. Such engagement operates to swing the segment on its fulcrum and through the link 53 to tip the pawl 27 on the projections 30, as in my patent, drawing the pawl-lug 29 away from engagement with the teeth 22 of the ratchet-disk. The disengagement of the pawl and ratchet is thus effected by rocking of the rock-shaft 6, such rocking being caused by outward movement of the fork slide m acting against the upturned arm 7 in a manner which will be obvious.

My present invention is not restricted to the precise construction and arrangement herein shown and described, as the same may be varied or rearranged in various particulars without departing from the spirit and scope of the invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is;- V

s 1. In a loom, a lay, take-up mechanism, operating connections therefor between it and the lay, and means operative automatically upon a predetermined retrograde movement of theloom to prevent cooperation of said connections and the lay and thereby prevent improper operation of the takeup mechanism. 2. In a loom, a lay, take-up mechanism, op erating connections therefor between it and the lay, and means, operative automatically uponv retrograde movement of the loom sufficient toeffect one pick or more, to prevent cooperation of said connections and the lay, whereby when no filling is laid the actuation of the take-up is retarded correspondingly when the loom is started.

3. In a loom, a lay, take-up mechanism, including a pawl, connections between the latter and the lay to operate the pawl on one stroke and set it on the other stroke of the lay, and means operative automatically upon retrograde movement of the loom to prevent cooperation of said connections and the lay to set the pawl.

4. In a loom, a lay, take-up mechanism, including an actuating-pawl, connections between the latter and the lay to normally effect the operation of the pawl, picking mechanism, and means having a predetermined relation to said picking mechanism to prevent cooperation of the lay and said connec-.

tions when the lay is moved backward a predetermined extent.

5. In a loom, a lay, take-up mechanism, including an actuating-pawl, connections between the latter and the lay to normally operate the pawl on one stroke and to set it on the other stroke of the lay, a picking-cam, and means having a fixed relation thereto to prevent cooperation of the lay and said connections to set the pawl when the lay is turned back far enough to effect one pick, or more.

6. In a loom, a lay and its lay-sword, an actuator mounted on the latter, take-up mechanism, including a cooperating pawl and ratchet, connections between the pawl and the actuator, including a transmitter to be engaged and reciprocated by the actuator when the loom is running, to effect the actuation of the take-up, and means to prevent automatically cooperation of the transmitter and actuator when theloom is turned back a predetermined amount.

7. In a loom, a lay and its lay-sword, an actuator mounted on the latter, take-up mechanism, including a cotiperating pawl and ratchet, connections between the pawl and the actuator, including a transmitter to be engaged by the actuator on the backward stroke of the lay to set the pawl and on the forward stroke of the lay to advance the pawl and effect take-up, picking mechanism to operate just before the advance of the pawl, and means to prevent setting of the pawl when the loom is turned back sufficient to effect one pick, or more.

8. In a loom, a lay and its lay-sword, an actuator mounted on the latter, take-up mechanism, including a codperating pawl and ratchet, connections between the pawl and the actuator, including a transmitter to be engaged and reciprocated by the actuator when the loom is running, to effect the actuation of the take-up picking mechanism, including a pick-cam, and a detaining-cam set behind the pick-cam and adapted to engage the transmitter, retrograde movement of the loom sufficient to effect a pick causing said detaining-cam to move the transmitter from cooperative engagement with the actuator, to thereby prevent setting the take-up pawl by such retrograde movement.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES F. ROPER,

Witnesses:

CLARE H. DRAPER, FRANK J. BUTCHER. 

